I just wanted to ask if i need a more powerful flash from a particular direction will putting another strobe in the same settings right next to each other give twice the output in terms of exposure ? Or though it mathematically sounds right it doesnt work that way in reality ?

The best way to understand this is to think of light as small particles (photons). Now if you fire your flash at a subject a certain amount of all the photons your flash emits are going to hit it. Placing a flash with the exact same output right next to the first one will therefore double the amount of particles. Double the amount of light means a gain of one stop (+1 EV).

Therefore two equal flashes at half power will produce about the same amount of light as one of those flashes at full power. The benefit will be to have a shorter flash duration and recycle time plus if your flashes run on batteries you will get more flashes out of them (unless they are both using the same battery pack).